9975239 has 4 divisors (see below), whose sum is σ = 10012320. Its totient is φ = 9938160.

The previous prime is 9975223. The next prime is 9975253. The reversal of 9975239 is 9325799.

9975239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9975239 - 2⁴ = 9975223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9975239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9975299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18134 + ... + 18675.

It is an arithmetic number, because the mean of its divisors is an integer number (2503080).

Almost surely, 2^9975239 is an apocalyptic number.

9975239 is a deficient number, since it is larger than the sum of its proper divisors (37081).

9975239 is a wasteful number, since it uses less digits than its factorization.

9975239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37080.

The product of its digits is 153090, while the sum is 44.

The square root of 9975239 is about 3158.3601757874. The cubic root of 9975239 is about 215.2655021765.

The spelling of 9975239 in words is "nine million, nine hundred seventy-five thousand, two hundred thirty-nine".